Botary pump



March M 11924.

' H. C. PHELLIPS ROTARY PUMP Filed June 11, 1923 2 Sheets-Sheet 1 March 111 1924;

H. C. PHBLLJPS ROTARY PUMP Filed June ll, 1923 2 Sheets-Sheet 2 R name Ma. ii, i924.

Ell

Application filed June 11, 1923. Serial Ho. $14,687.

To all whom it may concern:

Be it known that I, Y CLARENCE Ps, a subject of the King of Great Britain, residing at Gloucester, in the county of Gloucester, England, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a specificationi v This invention relates to rotary pumps, compressors, prime movers, and the like, of the type comprising a revoluble inner element having a plurality of radial projections and a revoluble investing outer element eccentrically disposed to the inner element, and with recesses or cavities to the extent of one more recess than there are projections on the inner element, with which recesses or cavities the projections sequentially engage, so that opening and closing pockets are formed as the element or elements rotate, whereby there is set up a suction and delivery action on the fluid when the apparatus is driven as a pump or compressor, or into which pockets fluid is admitted for the purpose of driving the apparatus. The present improvements are designed to reduce the capacity of the pockets without altering the speed of the engine, while at the same time maintaining a balance of displacement.

In the present invention, a revoluble inner element is adapted to traverse axially within a revoluble outer element, the displacement so caused being taken up by a movable complementary block of corresponding form or substantially so, to the internal shape 01" the outer element, whereby the capacity of the pockets is laterally contracted for admission or discharge of fluid;

Referring to the accompanying drawings illustrating a convenient embodiment of my invention,

Fig. 1 is a longitudinal section of a rotary pump or the like constructed according to this invention.

Fig.2 is a cross section on line A. B. of Fig. 1.

Fig. 3 is a cross sectlon on line C. D of Fig. 1.

a shaft 2 within an outer rotor or element 3, said rotors or elements being eccentrically disposed to each other and arranged within a casing 4:. The inner rotor or element 1 is provided with lobular projections hand the outer rotor or element 3 with a series of recesses 6 with which the projections 5 of the inner rotor or element 3. successively engage when rotation of the outer rotor or element 3 takes place.

Fhe inner element 1 is adapted to move axially and is endwise prolonged for a short distance beyond the circumvesting outer element 3 in such manner that its projecting part 1 normally engages a sleeve 7, the inner shape of which corresponds to the shape or" the outer periphery of the inner element 1, so that in a sense it constitutes a longitudinal extension of the outer element 3. This sleeve 7 is therefore carried round by the inner element 1 and endwise abuts against the outer element 3. At the opposite side of the apparatus is a complementary block 8 which may be adapted to rotate around an eccentric bush 9 which is freely-mounted upon a main shaft 2, said hush enabling the block 8 to run concentric with the outer element 3. The clock 8'is formed externally with projections 10 corresponding with the interior shape of the outer element 3 so that it is complementary thereto, and one end of it at 8 normally on gages with the outer element 3, whereby it partakes or" the rotary motion of the latter and is always in registration therewith. The block 8 may abut at its inner edge against the adjacent end of the inner element l. The latter and the block 8 may he moved endwise by means of axially parallel rods 11'acting at opposite ends of the apparatus, one freely abutting against the hack of the block 8 and the other abutting against the front face or" the inner element 1, said rods heing preferably coupled together by means of a connecting rod 12, to which an actuating lever 13 may be connected. it is to be understood, however, that the actuating gear may he substituted by any other suitable-mechanism. The casing 45 is provided with a suction or inlet side 14 and a delivery or outlet side 15 communicating with the pockets formed in the recesses 6 between the inner element 1 and the outer element 3.

In the position shown in Fig. l, the inner element 1 occupies the chamber in the outer element 3 to its maximum extent. If the inner element 1 is now advanced axially into the sleeve 7, the block 8 is advanced correspondingly into the outer element 3 so that the effective width of the pockets is consequently narrowed and their capacity reduced whereby less fluid is admitted to the pockets, resulting in a corresponding reduction in discharge. This effectis caused without the necessity of altering the speed of the engine. By reason of the block 8 following up the inner element 1, an enlarging space is formed at the back of same within the casing 4, while at the same time a reducing space is formed in the sleeve 7 at the front of the inner element 1. These ,two spaces intercommunicate and also the pockets formed between the two elements .aforesaid by means of pipes or conduits 16,

engaging a recess 19 in said block and being supported at the outer end in a guide bracket 20. Upon the rod 17 is mounted a pointer 21 adapted to move over a scale marked on a rod 22. The spaces within the casing 4 at opposite ends respectively of the inner element 1 and block 8" and also the recesses or pockets formed between the inner and outer elements 1 and 3 intercommunicate by means of pipes or conduits 23. An aux iliary pump rotor 24 is disposed in the circuit of the pipes 23 so that when the rotor is operated, the movement of the fluid through the pipes 23 is caused to move the inner rotor 1 together with the block 8 in one or the other direction and to any position so as to increase or decrease the ca acity. The fluid is admitted or discharge to or from the end of the inner rotor 1 by way of the annular recess 25 and the ports 26. In the view shown, the block 8 is almost entirely filling the internal capacity of the outer element 3 so that there is only a small effective space for admission and discharge .of the fluid. If the inner rotor 1 and the block 8 are caused to move to the right, an increasing capacity of the pockets is obtained between the inner and outer elements 1 and 3 and a correspondingly greater inlet and outlet. A pipe 27 may be arranged to connect the space 28 at the back of the rod 17 with the spaced part in the casing 4 at the back of the block 8".

What I do claim as my invention, and desire to secure by Letters Patent, is

1. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer casing for the outer element,

said revoluble inner member being adapted to traverse axially of the revoluble outer element, and a complementary block movable correspondingly with the inner element so as to take up displacement, whereby the capacity of the pockets'is varied for admission or discharge of fluid.

2. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble outer element, and a complementar block of corresponding form or substantially so to the internal shape of the outer element andmovable therein so as to take up displacement whereby the ca acity of the pockets is laterally contracte for admission or discharge of fluid.

3. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member being adapted to traverse axiall of the revoluble outer element, and an en -traversable complementary block mounted upon the shaft of the inner element concentrically with the outer element, said block having ripheral projections and recesses correspon ing to the internal recesses and projections of the outer element, such that as said block follows up the inner element, it provides a comple-. mentary medium occupying the displacement in the outer element.

4. A rotary pump, compressor prime mover, or the like, having in com ination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets. an outer casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble outer element, and a sleeve disposed co-axia-lly and rotatable with the inner. element, said sleeve having the same internal configuration or substantially so corresponding to the external configuration of the inner element, whereby it is adapted to receive the inner element as the latter is axially advanced from the outer element.

5. A rotary ump, compressor, prime mover, or the 11 e, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically dis posed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble nesaeee outer element, a complementary block movable correspondingly with the inner element so as to take up displacement in the outer element, and a bush freely mounted upon the shaft within the complementary block so as to cause the said block to be concentric with the outer element.

6. A rotary ump, compressor, prime mover, or the li e, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble outer element, a complementary block movable correspondingly with the inner element so as to take up displacement in the outer element, and means providing intercommunication Within the casing between the outward end of the inner element, the outward end of the complementary block and the pockets formed between the inner and outer elements.

7. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer-casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble outer element, a complementary block movable correspondingly with the inner element so as to take up displacement, and means for axially moving the inner element and complementary block together. for varying the capacity of the pockets between the inner and outer elements.

8. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member being vadapted to traverse axially of the revoluble outer element, a complementary block movable correspondingly with the inner element so as to take up displacement, and a guide rod upon the complementary block, said guide rod having a pointer adapted to move over a scale or marking for registering the position of the block in the outer element.

9. A rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically disposed revoluble outer element with exte rior pockets, an outer casing for the outer element, said revoluble inner member being adapted to traverse axially of the revoluble outer element, a complementary block movable correspondingly with the inner element so as to take up displacement, a guide rod connected to the complementary block, and a hollow guide bracket for the guide rod, the space of said bracket communicating by means of a conduit with the space within the casing at the back of the complementary block.

10. A. rotary pump, compressor, prime mover, or the like, having in combination a revoluble inner element with a plurality of radial projections, an eccentrically dis posed revoluble outer element with exterior pockets, an outer casing for the outer element, said revoluble inner member bein adapted to traverse axially of the revoluble outer element, a complementary block movable correspondingly with the inner element so as to take up displacement, conduits affording communication in the casing between the outward end of the inner element, the outward end of the complementary block and the pockets between the inner and outer elements, and an auxiliary pump rotor disposed in the circuit of the conduits so that axial movement is'imparted to the inner element and complementary block in either direction to increase or decrease the capacity.

In testimony whereof I afiix my signature.

HARRY o. PHILLIPS. 

